Quoting Jon Schewe <jpschewe at mtu.net>: > I've got a postfix mailserver that's getting a lot of spam (who > doesn't). The problem I'm trying to address is that some spammer sends > a messages to xyz at mydomain.com and xyz doesn't exist on my system, so > postfix generates a bounce message. However the reply-to in the > original message doesn't exist either, so the bounce, bounces back and > eventually ends up in the postmaster mailbox. Is there a way to tell > postfix to reject the message right away when the spammer tries to send > it, so that the bounce message isn't generated? Or to just give up on > bounced bounces? > That seems really odd. I would think that the default for an MTA would be to reject mail which does not have an intended recipient. I am not familiar with Postfix config, but a quick google indicates you should look at your config to see if you have something like so: your_domain.com anything Which would apparently accept anything sent to your_domain.com. Also, is there a secondary MX for your domain that might be catching some mail and forwarding it to you? I used to have some issues with that at work. Occasionally the secondary MX would get some mail and attempt to forward it to our server. Our server would reject it, the secondary MX would bounce it, and the apparent sending domain would bounce the bounce back to us. I stopped using a secondary MX after the virus bounces got really annoying, no need for it really if you have a somewhat reliable mail setup. Josh _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota Help beta test TCLUG's potential new home: http://plone.mn-linux.org Got pictures for TCLUG? Beta test http://plone.mn-linux.org/gallery tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list